Controller with a user interface



FIG. 1 is a front view of a first embodiment of a controller with a user interface, showing the claimed design; and,

FIG. 2 is a front view of a second embodiment thereof.

The dashed broken lines showing portions of the user interface flat control panel, text and other elements in the Figures form no part of the claimed design. The dot-dash-dot broken lines in the Figures represent boundaries and form no part of the claimed design. 

CLAIM The ornamental design for a controller with a user interface, as shown and described. 